Wireless Charging

Wireless battery charging or wireless inductive charging is a method for transferring electrical energy from a charger to a device without the need for a physical wire connection. Wireless charging is based on the principle of magnetic resonance, or Inductive Power Transfer (IPT). This is the process of transferring an electrical current between two objects through the use of coils to induce an electromagnetic field or to transfer the energy from one to another. The energy is transferred from the source to the receiver where it is typically used to charge the battery in the device.


The Mains voltage is converted into high frequency alternating current and this is sent to the transmitter coil by the transmitter circuit. The alternating current induces a time varying magnetic field in the transmitter coil. Current flowing within the transmitter coil induces a magnetic field which extends to the receiver coil. The magnetic field generates the current within the receiver coil of the device. Current flowing within the receiver coil is converted into direct current (DC) by the receiver circuit, which can then be used to charge the battery. The process of energy flow transmitted between the transmitter and receiver coil is also referred to as magnetic or resonant coupling and is achieved by both coils resonating at the same frequency.


It’s through this process that power is safely transferred over an air gap. As well as any non-metal object that might exist between the coils. Such as wood, plastic or granite. This makes wireless/inductive charging ideal for use with many portable devices such as mobile phones and other wireless applications.


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Videos

Wireless Power Transmitter for Automotive Applications

Smart Wireless Charging with NFC (and Qi) - NXP® at MWC 2014

Smart wireless charging with NXP®: Flexible architectures

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BQ51222YFPT
BQ51222YFPT - Wireless Power Receiver, 4 V to 10 V in, DSBGA-42

2643399

Wireless Power Receiver, 4 V to 10 V in, DSBGA-42

TEXAS INSTRUMENTS

WIRELESS POWER RECEIVER, DSBGA-42; Wireless Charging IC Type:Receiver; Wireless Power Standard:WPC 1.2 Compliant; Power Level:5W; Operating Temperature Range:-40°C to 125°C; IC Package Type:DSBGA; No. of Pins:42Pins; Product Range:-; MSL:MSL 1 - Unlimite

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STEVAL-ISB039V1T
STEVAL-ISB039V1T - Evaluation Board, 1W Wireless Power Transmitter, Based on STM32F0 MCU

2668491

Evaluation Board, 1W Wireless Power Transmitter, Based on STM32F0 MCU

STMICROELECTRONICS

EVAL BOARD, WIRELESS POWER TX; Kit Application Type:Wireless - Battery Charger; Application Sub Type:Wireless Power Transmitter; Silicon Core Number:STM32F0; Silicon Manufacturer:STMicroelectronics; Kit Contents:Eval Board STM32F0; Product Range:-; SVHC:

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STEVAL-ISB039V1
STEVAL-ISB039V1 - Evaluation Board, 1W Wireless Power Transmitter & Receiver, Based on STM32F0, STWLC03 MCU's

2668498

Evaluation Board, 1W Wireless Power Transmitter & Receiver, Based on STM32F0, STWLC03 MCU's

STMICROELECTRONICS

EVAL BOARD, WIRELESS POWER TXRX; Kit Application Type:Wireless - Battery Charger; Application Sub Type:Wireless Power Transmitter & Receiver; Silicon Core Number:STM32F0, STWLC03; Silicon Manufacturer:STMicroelectronics; Kit Contents:Eval Board STM32F0,

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MAX77950EVKIT#
MAX77950EVKIT# - Evaluation Kit, MAX77950 Advanced Wireless Power Receiver IC, WPC/PMA Compliance

2762631

Evaluation Kit, MAX77950 Advanced Wireless Power Receiver IC, WPC/PMA Compliance

MAXIM INTEGRATED PRODUCTS

EVAL BOARD, WIRELESS PWR RECEIVER; Silicon Manufacturer:Maxim Integrated Products; Silicon Core Number:MAX77950; Kit Application Type:Wireless Development; Application Sub Type:Wireless Power Receiver; Kit Contents:Eval Board MAX77950, Planar Coil, S/W;

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MWCT1101CLH
MWCT1101CLH - Wireless Charging Controller, 32 Bit DSP, 3 V to 3.6 V, LQFP-64

2401867

Wireless Charging Controller, 32 Bit DSP, 3 V to 3.6 V, LQFP-64

NXP

WIRELESS POWER TRANSMITTER, LQFP-64; Wireless Charging IC Type:Transmitter; Wireless Power Standard:WPC 1.1.2 Compliant; Power Level:5W; Operating Temperature Range:-40°C to 85°C; IC Package Type:LQFP; No. of Pins:64Pins; Product Range:-; MSL:MSL 3 - 168

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LTC4125EUFD#PBF
LTC4125EUFD#PBF - Wireless Power Transmitter, 3 V to 5.5 V in, QFN-20

2522858

Wireless Power Transmitter, 3 V to 5.5 V in, QFN-20

LINEAR TECHNOLOGY

WIRELESS PWR TX, 5.5V, QFN-20; IC Function:Wireless Power Transmitter; Supply Voltage Min:3V; Supply Voltage Max:5.5V; IC Package Type:QFN; No. of Pins:20Pins; Operating Temperature Min:-40°C; Operating Temperature Max:125°C; Product Range:-; Automotive

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760 308 MP
760 308 MP - Evaluation Kit, Wireless Power Design, Qi v1.2.2 Compliant, Transmitter Module, Receiver Module

2706219

Evaluation Kit, Wireless Power Design, Qi v1.2.2 Compliant, Transmitter Module, Receiver Module

ROHM

EVAL BOARD, WIRELESS POWER TR & RX; Silicon Manufacturer:Rohm Semiconductor; Silicon Core Number:BD57015GWL, B57020MWV, ML610Q772, BD9E151; Kit Application Type:Wireless Development; Application Sub Type:Wireless Power Transmitter & Receiver; Kit Content

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BD57015GWL-E2
BD57015GWL-E2 - Wireless Power Receiver IC, 10W

2691835

Wireless Power Receiver IC, 10W

ROHM

WIRELESS POWER RECEIVER, WLCSP-63; Wireless Charging IC Type:Receiver; Wireless Power Standard:WPC 1.2 Compliant; Power Level:15W; Operating Temperature Range:-30°C to 85°C; IC Package Type:WLCSP; No. of Pins:63Pins; Product Range:-; MSL:MSL 1 - Unlimite

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STWLC03JR
STWLC03JR - Dual Mode Qi/PMA Wireless Power Receiver, 5 V in, CSP-77

2668698

Dual Mode Qi/PMA Wireless Power Receiver, 5 V in, CSP-77

STMICROELECTRONICS

WIRELESS POWER RECEIVER, FLIP CHIP-77; Wireless Charging IC Type:Receiver; Wireless Power Standard:WPC Compliant; Power Level:7.5W; Operating Temperature Range:-; IC Package Type:Flip Chip; No. of Pins:77Pins; Product Range:-; MSL:-; SVHC:No SVHC (20-Jun

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BD57020MWV-E2
BD57020MWV-E2 - Wireless Power Transmitter IC

2691836

Wireless Power Transmitter IC

ROHM

WIRELESS POWER TRANSMITTER, UQFN-40; Wireless Charging IC Type:Transmitter; Wireless Power Standard:WPC 1.2 Compliant; Power Level:15W; Operating Temperature Range:-20°C to 85°C; IC Package Type:UQFN; No. of Pins:40Pins; Product Range:-; MSL:MSL 1 - Unli

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